Aminolysis of aryl dithio-2-thiophenates and dithio-2-furoates in acetonitrile
摘要:
The aminolyses of the title substrates with anilines and benzylamines are investigated in acetonitrile. A clean second-order kinetics is obtained with a first-order rate law in the amine concentration, which is uncomplicated by the fast proton transfer step. The large magnitude of rho(z) (rho(1g)) as well as rho(x) (rho(nuc)) together with relatively large positive p(xz) values is consistent with a stepwise mechanism in which thiophenolate ion expulsion from the intermediate is rate limiting. For the reactions of aryl dithio-2-thiophenates with benzylamines the magnitude of rho(x) and rho(z) values is relatively smaller suggesting that both the addition and expulsion of thiophenolate are partially rate determining. Relatively large secondary kinetic isotope effects, k(H)/k(D) greater than or equal to 1.7, with deuterated nucleophiles, support involvement a concurrent proton transfer to the departing thiophenolate ion in the transition state. (C) 1998 John Wiley & Sons, Inc.
Direct oxidative coupling of thiols and benzylic ethers via C(sp<sup>3</sup>)–H activation and C–O cleavage to lead thioesters
作者:J. Feng、M.-F. Lv、G.-P. Lu、C. Cai
DOI:10.1039/c4ob02250e
日期:——
An unprecedented C–S formation method via direct oxidative C(sp3)–H bond functionalization and C–O cleavage of benzylicethers was developed. Various thioesters including thioester structure containing drug intermediates could be achieved by this convenient, metal and base free method in satisfactory yields.
The Pt-catalyzed decarbonylative furylthiolation of terminal alkynes by furylthioesters took place regio- and stereoselectively under toluene reflux to give vinylsulfides with cis-furyl group at β-carbon in moderate yields.
Iron-Catalyzed Synthesis of Thioesters from Thiols and Aldehydes in Water
作者:Yu-Ting Huang、Shao-Yi Lu、Chih-Lun Yi、Chin-Fa Lee
DOI:10.1021/jo500574p
日期:2014.5.16
The preparation of thioesters through the iron-catalyzed coupling reaction of thiols with aldehydes is described. The reactions were carried out by using tert-butyl hydroperoxide (TBHP) as an oxidant and water as a solvent in most cases. This system is compatible with a variety of functional groups.
Some New Thiol Esters. Preparation of Dithiolfumarates
作者:Gene Sumrell、Morris Zief、Earl J. Huber、George E. Ham、Charles H. Schramm
DOI:10.1021/ja01525a052
日期:1959.8
Iron-catalyzed thioesterification of methylarenes with thiols in water
作者:Liang Wang、Jing Cao、Qun Chen、Ming-yang He
DOI:10.1016/j.tetlet.2014.10.155
日期:2014.12
An iron-catalyzed coupling reaction of methylarenes with thiols leading to thioesters has been developed. The reactions were carried out in water with tert-butyl hydroperoxide (TBHP) as the oxidant and polyoxyethanyl α-tocopheryl sebacate (PTS) as the surfactant. The reaction medium is compatible with a series of functional groups and can be reused.